When I was a teenager, we drove to the west coast across the country. I can't remember exactly where it was, but somewhere near Salt Lake City in Utah, think it may have been west of there, there are mountains that rise above the desert floor.
My father thought he saw a high water marks on those mountains, could have been as much as 70 feet, from ages ago (some would say millenia). So he must have read something because he was looking for it, didn't just happen to notice it. Whatever it was or wasn't, maybe there is another hypothesis for it now.
A higher elevation and regional phenomenon would explain that; it wouldn't necessarily have been related to sea levels.
“somewhere near Salt Lake City in Utah, think it may have been west of there, there are mountains that rise above the desert floor. My father thought he saw a high water marks on those mountains”
Your father was probably correct. Salt Lake is the remnant of an ancient inland sea, with the salt concentrations being left from the evaporated ocean. The whole area was at one time submerged, and not terribly long ago as geologic natural history goes.
Lake Bonneville. Not a worldwide flood.
I don’t know if this would explain it, but Salt Lake was once much larger than it is today.